Single-crystal ESR spectra of tris(octamethylpyrophosphoramide) manganese (II) perchlorate

Woltermann, Gerald M.; Wasson, John R.

doi:10.1016/0009-2614(72)80466-4

Cited by 18 publications

(3 citation statements)

References 16 publications

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“…63 When no halides are linked to a synthetic hexacoordinated Mn II ion and with the exception of the N 3 O 3 systems mentioned above, 23 only O 6 -or N 6 -coordination spheres have been investigated. 15,22,23,[64][65][66][67][68][69][70] The ligands used are either mono-or bidentate and the D magnitudes range from 0.004 to 0.085 cm -1 . However, larger D values, 0.175 and 0.219 cm -1 , are obtained with the Mn II ion doped in [Cd(bpa) 2 ](ClO 4 ) 2 and [Zn(bpa) 2 ](ClO 4 ) 2 compounds, respectively, where bpa is the bis(2-pyridylmethyl)amine ligand.…”

Section: Resultsmentioning

confidence: 99%

Syntheses, X-ray Structures, Solid State High-Field Electron Paramagnetic Resonance, and Density-Functional Theory Investigations on Chloro and Aqua Mn^II Mononuclear Complexes with Amino-Pyridine Pentadentate Ligands

et al. 2008

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The two pentadentate amino-pyridine ligands L5(2) and L5(3) (L5(2) and L5(3) stand for the N-methyl-N,N',N'-tris(2-pyridylmethyl)ethane-1,2-diamine and the N-methyl-N,N',N'-tris(2-pyridylmethyl)propane-1,3-diamine, respectively) were used to synthesize four mononuclear Mn(II) complexes, namely [(L5(2))MnCl](PF6) (1(PF6)), [(L5(3))MnCl](PF6) (2(PF6)), [(L5(2))Mn(OH2)](BPh4)2 (3(BPh4)2), and [(L5(3))Mn(OH2)](BPh4)2 (4(BPh4)2). The X-ray diffraction studies revealed different configurations for the ligand L5(n) (n = 2, 3) depending on the sixth exogenous ligand and/or the counterion. Solid state high-field electron paramagnetic resonance spectra were recorded on complexes 1-4 as on previously described mononuclear Mn(II) systems with tetra- or hexadentate amino-pyridine ligands. Positive and negative axial zero-field splitting (ZFS) parameters D were determined whose absolute values ranged from 0.090 to 0.180 cm(-1). Density-functional theory calculations were performed unraveling that, in contrast with chloro systems, the spin-spin and spin-orbit coupling contributions to the D-parameter are comparable for mixed N,O-coordination sphere complexes.

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Section: Resultsmentioning

confidence: 99%

Syntheses, X-ray Structures, Solid State High-Field Electron Paramagnetic Resonance, and Density-Functional Theory Investigations on Chloro and Aqua Mn^II Mononuclear Complexes with Amino-Pyridine Pentadentate Ligands

et al. 2008

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“…The absolute value of A is determined from the average of the hyperfine splittings of the five sextets32 and is assumed to have a negative sign for manganese(II). [33][34][35] The parameters of the spin Hamiltonian for Mn(en)32+ derived as described above, along with those of two other related manganese(II) complexes, are given in Table II. 36 The points of interest are the sign and magnitude of the zero-field splitting parameter D. It has been previously predicted24•37 that the sign of D should relate to the sense of the trigonal distortion and to the identity of the first excited state (i.e., 4E or 4At in Z)3).…”

Section: Discussionmentioning

confidence: 99%

Electronic structure of the tris(ethylenediamine)manganese(II) ion. Circular and linear dichroism and electron paramagnetic resonance spectra of tris(ethylenediamine)manganese(II) nitrate

Palmer¹,

Hempel²

1978

Inorg. Chem.

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“…Alterations of A, on the other hand, seem to be more informative, since from solid state examples it is known that A is correlated to certain complex properties. Decreasing A is generally assumed to indicate increasing covalency [17], the highest ionic character corresponding to about ^Ä slO m T [18]. Furthermore, A tends to decrease with decreasing ligand distances [19].…”

Section: Discussionmentioning

confidence: 99%

Electron Spin Resonance of Manganese Nitrate in Diethylacetamide-Water Solution

Kleinmann

Stockhausen

1981

Zeitschrift Für Naturforschung A

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E le c tro n S p in R e s o n a n c e o f M a n g a n e se N i t r a t e in D ie th y la c e ta m id e -W a te r S o lu tio n V. Kleinmann and M. Stockhausen Institut für Physikalische Chemie der Universität Münster Z. Naturforsch. 86a, 751-758 (1981); received June 5, 1981 At small water concentrations, ESR spectra at room temperature exhibit distinguishable con tributions which are ascribed to the following ionic species: (I) a small fraction of residual manga nese ions with mixed amide-water solvation, (II) amide solvated ions (having altered hyperfine splitting and gr-factor due to nitrate in an outer coordination sphere, so that they may be con sidered loose ion pairs), (III) tight ion pair species. Presumably, (II) and (III) are not well defined "chemical" species but constituents of fluctuating aggregations.

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Single-crystal ESR spectra of tris(octamethylpyrophosphoramide) manganese (II) perchlorate

Cited by 18 publications

References 16 publications

Syntheses, X-ray Structures, Solid State High-Field Electron Paramagnetic Resonance, and Density-Functional Theory Investigations on Chloro and Aqua Mn^II Mononuclear Complexes with Amino-Pyridine Pentadentate Ligands

Syntheses, X-ray Structures, Solid State High-Field Electron Paramagnetic Resonance, and Density-Functional Theory Investigations on Chloro and Aqua Mn^II Mononuclear Complexes with Amino-Pyridine Pentadentate Ligands

Electronic structure of the tris(ethylenediamine)manganese(II) ion. Circular and linear dichroism and electron paramagnetic resonance spectra of tris(ethylenediamine)manganese(II) nitrate

Electron Spin Resonance of Manganese Nitrate in Diethylacetamide-Water Solution

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Single-crystal ESR spectra of tris(octamethylpyrophosphoramide) manganese (II) perchlorate

Cited by 18 publications

References 16 publications

Syntheses, X-ray Structures, Solid State High-Field Electron Paramagnetic Resonance, and Density-Functional Theory Investigations on Chloro and Aqua MnII Mononuclear Complexes with Amino-Pyridine Pentadentate Ligands

Syntheses, X-ray Structures, Solid State High-Field Electron Paramagnetic Resonance, and Density-Functional Theory Investigations on Chloro and Aqua MnII Mononuclear Complexes with Amino-Pyridine Pentadentate Ligands

Electronic structure of the tris(ethylenediamine)manganese(II) ion. Circular and linear dichroism and electron paramagnetic resonance spectra of tris(ethylenediamine)manganese(II) nitrate

Electron Spin Resonance of Manganese Nitrate in Diethylacetamide-Water Solution

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Syntheses, X-ray Structures, Solid State High-Field Electron Paramagnetic Resonance, and Density-Functional Theory Investigations on Chloro and Aqua Mn^II Mononuclear Complexes with Amino-Pyridine Pentadentate Ligands

Syntheses, X-ray Structures, Solid State High-Field Electron Paramagnetic Resonance, and Density-Functional Theory Investigations on Chloro and Aqua Mn^II Mononuclear Complexes with Amino-Pyridine Pentadentate Ligands